Police began an investigation after the fight was caught on camera outside Mr Packer's Bondi home on Sunday afternoon.

Mr Gyngell has accepted responsibility for sparking the brawl with Mr Packer, his friend of 35 years.

NSW Acting Assistant Commissioner Mark Walton says there is legally no compulsion for the two media moguls to be interviewed.

"We have had contact through a legal advisor indicating if they wish to indicate anything to us, to come and see us," he said at a press conference.

"We have made the approach."

Acting Assistant Commissioner Walton says the high profiles of those involved in the brawl will not affect the investigation.

He says investigators are reviewing the photos and video footage of the brawl to determine whether charges can be made.

"The investigators will work through ... any material [as it] becomes available to them to assess and make a determination whether there is any offence disclosed in this matter," he said.

Up to $200,000 is believed to have been paid by News Corp for the sequence of photos taken by a paparazzo who was in the area hoping to get a snap of model Miranda Kerr, who is understood to be in a romantic relationship with Mr Packer.